These articles regarding what the considerations are in developing a mobile app using HTML5, and the specific in developing them.
Workflow for Developing PhoneGap Applications
On the design process, the IDEs/ debuggers/ build tools used, and the frameworks to consider.
Performance & UX Considerations For Successful PhoneGap Apps
On the various ways to improve the run time performance of a HTML5 app.
There is quite a lot to digest here (there are several frameworks which I have not yet even looked at) - time permitting, I shall endeavour to post some thoughts on these. Until then, just these annotated hyperlinks.